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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 448 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.56 + 13 =
  2. 2.87 + 16 =
  3. 3.52 + 57 =
  4. 4.57 + 38 =
  5. 5.44 + 34 =
  6. 6.51 + 36 =
  7. 7.35 + 77 =
  8. 8.71 + 86 =
  9. 9.88 + 43 =
  10. 10.37 + 26 =
  11. 11.44 + 13 =
  12. 12.60 + 32 =
  13. 13.89 + 52 =
  14. 14.30 + 49 =
  15. 15.27 + 66 =
  16. 16.59 + 77 =
  17. 17.84 + 41 =
  18. 18.75 + 73 =
  19. 19.69 + 36 =
  20. 20.61 + 18 =
  21. 21.49 + 78 =
  22. 22.48 + 71 =
  23. 23.54 + 62 =
  24. 24.35 + 46 =
  25. 25.83 + 21 =
  26. 26.66 + 61 =
  27. 27.85 + 73 =
  28. 28.42 + 71 =
  29. 29.39 + 72 =
  30. 30.47 + 15 =
  31. 31.33 + 47 =
  32. 32.51 + 76 =
  33. 33.87 + 77 =
  34. 34.60 + 25 =
  35. 35.40 + 72 =
  36. 36.54 + 47 =
  37. 37.30 + 78 =
  38. 38.74 + 56 =
  39. 39.36 + 54 =
  40. 40.47 + 62 =

Answer key

  1. 69
  2. 103
  3. 109
  4. 95
  5. 78
  6. 87
  7. 112
  8. 157
  9. 131
  10. 63
  11. 57
  12. 92
  13. 141
  14. 79
  15. 93
  16. 136
  17. 125
  18. 148
  19. 105
  20. 79
  21. 127
  22. 119
  23. 116
  24. 81
  25. 104
  26. 127
  27. 158
  28. 113
  29. 111
  30. 62
  31. 80
  32. 127
  33. 164
  34. 85
  35. 112
  36. 101
  37. 108
  38. 130
  39. 90
  40. 109

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